Flat bolsters provide a bit more support because they're wider and have a foam core wrapped in 100% cotton batting. They are a must for restorative yoga where props are used to do the work of taking stress off the body, but they can be a great tool to refine your vinyasa skills, strengthen deep postural muscles and develop flexibility while simultaneously allowing yourself to be supple enough to yield to support and free your breathing. 

Supported Backbend

 

Wheel of Life Pose

Seated Forward Fold with a Block

 

Revolved Janu Sirsasana A

 

Standing Wide Angle Forward Fold

 

Superb Standing Forward Fold

Supported Shoulder Stand

 

Supported Handstand

 

Crow Pose Security